oracle query table name

In Oracle database, there are many ways to query table names. Here are some common query methods.

1. Use the SELECT command to query

You can use the SELECT command in SQL to query the table name. The specific syntax is:

SELECT table_name
FROM user_tables;

Among them, table_name is the name of the table you need to query, user_tables is the system table that comes with the Oracle system, used to store the current user All table information below.

For example, if you want to query whether a table named orders exists, the command is as follows:

SELECT table_name
FROM user_tables
WHERE table_name = 'orders';

If the table exists, the table name orders# will be output. ##;If the table does not exist, there will be no output.

Use the
2. DESCRIBE command to query the

DESCRIBE command is a command provided by Oracle for querying the table structure. You can use This command views column names, data types, lengths and other information in all tables. At the same time, this command can also query the table name. The specific syntax is:

DESCRIBE table_name;

For example, if you want to query whether a table named

orders exists, the command is as follows:

DESCRIBE orders;

If the table exists, the table structure information will be output; if the table does not exist, an error message will be prompted.

Use
3. ALL_TABLES View query

ALL_TABLES The view is a view that comes with the Oracle system and is used to query the current user All table information below, including table name, table space name, owner and other information. You can query the table name through the following command:

SELECT table_name
FROM all_tables
WHERE owner = <用户名称>;

where

owner is the user name to be queried. You can query all table information under the current user without adding this condition.

For example, if you want to query all table information under the current user, the command is as follows:

SELECT table_name
FROM all_tables;

If you want to query all table information under user

SCOTT, the command is as follows:

SELECT table_name
FROM all_tables
WHERE owner = 'SCOTT';

The above are several ways to query Oracle table names. Using these methods can quickly query the required table information, and at the same time, it is also convenient for developers to develop and manage in the Oracle database.

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